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![]() "Rob" napisał w wiadomości ... Szczepan Bialek wrote: From Maxwell's time all circuits are closed. So sometimes the current must flow in the air. Of course sometimes is enough if only part flows in the air. It is the leakage. At HF the leakage is rather large. But today we know that this is not true. "A great deal of analytical and experimental work has been done over the past 100 years on the design and performance of ground systems for verticals. " And in summary: "Depending on the character of the soil, it is possible there may be some increase in soil conductivity as we go up in frequency which might compensate a bit. " "The purpose of the radial system is to divert current from the soil into the radial conductors which have very low loss compared to soil. We can calculate the current division between a radial system and the soil ".From: http://www.kkn.net/dayton2004/HF_ver...6LF_Dayton.pdf For me the current between the radial and soil (or air) is the leakage: Is at HF the leakage rather large? S*. |
#2
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Szczepan Bialek wrote:
"Rob" napisa? w wiadomo?ci ... Szczepan Bialek wrote: From Maxwell's time all circuits are closed. So sometimes the current must flow in the air. Of course sometimes is enough if only part flows in the air. It is the leakage. At HF the leakage is rather large. But today we know that this is not true. "A great deal of analytical and experimental work has been done over the past 100 years on the design and performance of ground systems for verticals. " And in summary: "Depending on the character of the soil, it is possible there may be some increase in soil conductivity as we go up in frequency which might compensate a bit. " "The purpose of the radial system is to divert current from the soil into the radial conductors which have very low loss compared to soil. We can calculate the current division between a radial system and the soil ".From: http://www.kkn.net/dayton2004/HF_ver...6LF_Dayton.pdf For me the current between the radial and soil (or air) is the leakage: Nope, you have no clue what is actually happening. Is at HF the leakage rather large? This is a nonsense question based on a total lack of understading of what is really happening. |
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